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I might be missing something, but I am expecting the following code to print out a list of lists with each internal list holding one number[0-4], but instead the internal lists are a copy of the list "count". 
#!/usr/bin/python
count = range(4)
twoDimensionList = [[]] * len(count)
for i in range(len(count)):
 twoDimensionList[i].append(count[i])
print twoDimensionList
Should print: 
[[0], [1], [2], [3]]
but erroneously prints:
[[0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3], [0, 1, 2, 3]]